作者:Marc Lang、Ernst Hungerbühler、Peter Schneider、Riccardo Scartazzini、Werner Tosch、Edward A. Konopka、Oto Zak
DOI:10.1002/hlca.19860690709
日期:1986.10.29
In continuation of our work on penem antibiotics, novel chiral (5R,6S)-2-(1′-aminoalkyl)-6-(hydroxyalkyl)-derivatives 1 have been synthesized by two essentially different strategies. Whereas the starting materials for 1a-f, azetidinones 2 and 5, were obtained from chiral building blocks (6-aminopenicillanic acid and L-threonine, resp.), the one for 1g, azetidinone 9, was derived from racemic 4-acetoxyazetidinone